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idoc - 3:26 am on Jun 2, 2005 (gmt 0)
All commercial spiders utilize your commercial resources for their commercial benefit. With the major search engines it is mostly win-win because they generate trafic in return. With many other commercial bots there is no upside. I always ban commercial bots where there is no upside without particular regard to what their commercial interests are.
Sounds like you have the mask aready, but in case... a /26 cidr notation corresponds to a 255.255.255.192 subnet mask.